| Nostoc punctiforme | |
|---|---|
 | |
Scientific classification  | |
| Domain: | Bacteria |
| Kingdom: | Bacillati |
| Clade: | "Cyanobacteria/Melainabacteria clade" |
| Phylum: | Cyanobacteria |
| Class: | Cyanophyceae |
| Order: | Nostocales |
| Family: | Nostocaceae |
| Genus: | Nostoc |
| Species: | N. punctiforme |
| Binomial name | |
| Nostoc punctiforme (Kütz.) Har. | |
Nostoc punctiforme is a species of filamentous cyanobacterium. Under non-limiting nutritional environmental conditions, its filaments are composed of photosynthetic vegetative cells; upon nutrient limitation, some of these cells undergo differentiation into heterocysts, akinetes or hormogonia. [1]
N. punctiforme is one of the Nostoc strains able to maintain diazotrophic symbiosis with higher plants such as the bryophytes Anthocerus punctatus and Blasia pusilla , water ferns from the genus Azolla , the cycads Macrozamia spp., and the angiosperm Gunnera . [2]
Applications:
Modified Nostoc punctiforme intein (Npu DnaE split intein) is used for a self-cleaving protein purification (e.g. iCapTag™). [3] [4]